Field-stable SQUID magnetometer with sub-fT Hz-1/2 resolution based on sub-micrometer cross-type Josephson tunnel junctions

被引：65

作者：

Schmelz, M. ^{[1
]}

Stolz, R. ^{[1
]}

Zakosarenko, V. ^{[1
]}

Schoenau, T. ^{[1
]}

Anders, S. ^{[1
]}

Fritzsch, L. ^{[1
]}

Mueck, M. ^{[2
]}

Meyer, H-G ^{[1
]}

机构：

[1] Inst Photon Technol, D-07702 Jena, Germany

[2] Univ Giessen, Inst Appl Phys, D-35392 Giessen, Germany

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2011年 / 24卷 / 06期

关键词：

QUANTUM INTERFERENCE DEVICE; DC SQUID; NOISE;

D O I：

10.1088/0953-2048/24/6/065009

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on the development of a new family of magnetic field sensors with exceptionally low magnetic field noise, as low as 0.3 fT Hz(-1/2). Beside this, they exhibit high usable voltage swings of more than 150 mu V-pp and tolerable background fields during cool-down of up to 6.5 mT. In operation mode they recover completely from magnetization pulses of up to 76 mT, which makes them well suited for applications such as low-field magnetic resonance imaging. With respect to their easy and reliable use as well as their field resolution in the sub-fT Hz(-1/2) range, the presented SQUID sensors are adequate for many applications, such as in geophysics or in biomagnetism.

引用

页数：5

共 16 条

[1] Sub-micrometer-sized, cross-type Nb-AlOx-Nb tunnel junctions with low parasitic capacitance [J].